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Last modified
7/14/2009 5:02:37 PM
Creation date
5/20/2009 3:04:15 PM
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UCREFRP
UCREFRP Catalog Number
9691
Author
Recovery Implementation Program.
Title
Recovery Implementation Program For Endangered Fish Species in the Upper Colorado River Basin 25th Annual Recovery Program Researchers Meeting.
USFW Year
2004.
USFW - Doc Type
Moab, UT.
Copyright Material
NO
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<br />6 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />ABSTRACTS <br /> <br />Instream Flow <br /> <br />Instream flow recommendations using a meso-habitat approach for native fish <br />populations in the Yampa and Colorado Rivers. <br /> <br />Anderson, Rickl, and Gregory B. Stewart2 <br /> <br />I Colorado Division of Wildlife, Grand Junction. CO 2 Oregon State University, <br />Corvallis. OR <br /> <br />Establishment of instream flows are generally considered to be a valuable tool for <br />maintaining declining or threatened native fish populations. In 1999 the DOW began a <br />research project to make biologically justified instream flow recommendations. <br />Anderson and Stewart (2003) designed a Meso-Habitat approach similar in concept to <br />PHABSIM in that it included a hydraulic model to simulate flow conditions and a species <br />habitat suitability index used to predict habitat availability, Channel topography was <br />surveyed with RTK GPS at six study sites on three rivers. A 2-D flow model was used to <br />simulate depths and velocities for each site. A large part of th\:; study was to develop <br />meso-habitat criteria for two native fish, the flannelmouth and bluehead suckers. This <br />was accomplished by examining the relationship between their abundance within sub- <br />reaches of each study site. The physical attributes of each sub-reach were correlated <br />against fish abundance. The output of the Meso-Habitat methodology was four meso- <br />habitat types for each species that quantified unusable, unsuitable, marginal and optimal <br />habitat availability for a range of tlows. Channel geomorphology was found to be similar <br />for the Yampa River and I5-Mile Reach of Colorado River. Flows that optimized habitat <br />were also similar and in the range of 900 to 1,200 cfs. However because of differences in <br />historic water availability the minimum base now recommendation for the Yampa River <br />was 200 cfs and it was 600 cfs for the I5-Mile Reach. <br /> <br />Gunnison River I Aspinall Unit Temperature Study - Phase II <br /> <br />Cutler, Amyl, and Jean Marie Boyer:! <br /> <br />I Bureau of Reclamation; 2 fl.vdrosphere Consultants <br /> <br />A reservoir temperature model, CE-QUAL-W2. and a river temperature model, QUAL- <br />2K, are used to analyze reservoir operational scenarios to determine the range of release <br />temperatures possible from Crystal Reservoir and temperature-related effects on the <br />Gunnison River downstream for the purpose of enhancing the survivability endangered <br />native fish species, the Colorado pikeminnow, Historic reservoir release temperatures are <br />compared to modeled release temperatures resulting from the proposed "Flow <br />Recommendations", and from two hypothetical selective withdrawal structures at the <br />
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